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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/system.h"
#include "common/algorithm.h"
#include "graphics/screen.h"
#include "graphics/palette.h"
namespace Graphics {
Screen::Screen(): ManagedSurface() {
create(g_system->getWidth(), g_system->getHeight(), g_system->getScreenFormat());
}
Screen::Screen(int width, int height): ManagedSurface() {
create(width, height);
}
Screen::Screen(int width, int height, PixelFormat pixelFormat): ManagedSurface() {
create(width, height, pixelFormat);
}
void Screen::update() {
// Merge the dirty rects
mergeDirtyRects();
// Loop through copying dirty areas to the physical screen
Common::List<Common::Rect>::iterator i;
for (i = _dirtyRects.begin(); i != _dirtyRects.end(); ++i) {
const Common::Rect &r = *i;
const byte *srcP = (const byte *)getBasePtr(r.left, r.top);
g_system->copyRectToScreen(srcP, pitch, r.left, r.top,
r.width(), r.height());
}
// Signal the physical screen to update
g_system->updateScreen();
_dirtyRects.clear();
}
void Screen::addDirtyRect(const Common::Rect &r) {
Common::Rect bounds = r;
bounds.clip(getBounds());
bounds.translate(getOffsetFromOwner().x, getOffsetFromOwner().y);
if (bounds.width() > 0 && bounds.height() > 0)
_dirtyRects.push_back(bounds);
}
void Screen::makeAllDirty() {
addDirtyRect(Common::Rect(0, 0, this->w, this->h));
}
void Screen::mergeDirtyRects() {
Common::List<Common::Rect>::iterator rOuter, rInner;
// Process the dirty rect list to find any rects to merge
for (rOuter = _dirtyRects.begin(); rOuter != _dirtyRects.end(); ++rOuter) {
rInner = rOuter;
while (++rInner != _dirtyRects.end()) {
if ((*rOuter).intersects(*rInner)) {
// These two rectangles overlap, so merge them
unionRectangle(*rOuter, *rOuter, *rInner);
// remove the inner rect from the list
_dirtyRects.erase(rInner);
// move back to beginning of list
rInner = rOuter;
}
}
}
}
bool Screen::unionRectangle(Common::Rect &destRect, const Common::Rect &src1, const Common::Rect &src2) {
destRect = src1;
destRect.extend(src2);
return !destRect.isEmpty();
}
void Screen::getPalette(byte palette[PALETTE_SIZE]) {
assert(format.bytesPerPixel == 1);
g_system->getPaletteManager()->grabPalette(palette, 0, PALETTE_COUNT);
}
void Screen::getPalette(byte *palette, uint start, uint num) {
assert(format.bytesPerPixel == 1);
g_system->getPaletteManager()->grabPalette(palette, start, num);
}
void Screen::setPalette(const byte palette[PALETTE_SIZE]) {
assert(format.bytesPerPixel == 1);
g_system->getPaletteManager()->setPalette(palette, 0, PALETTE_COUNT);
}
void Screen::setPalette(const byte *palette, uint start, uint num) {
assert(format.bytesPerPixel == 1);
g_system->getPaletteManager()->setPalette(palette, start, num);
}
void Screen::clearPalette() {
byte palette[PALETTE_SIZE];
Common::fill(&palette[0], &palette[PALETTE_SIZE], 0);
setPalette(palette);
}
} // End of namespace Graphics
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